/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:57:33,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:57:33,257 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:57:33,265 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:57:33,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:57:33,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:57:33,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:57:33,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:57:33,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:57:33,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:57:33,301 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:57:33,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:57:33,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:57:33,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:57:33,304 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:57:33,304 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:57:33,304 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:57:33,304 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:57:33,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:57:33,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:57:33,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:57:33,305 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:57:33,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:57:33,306 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:57:33,306 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:57:33,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:57:33,307 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:57:33,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:57:33,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:57:33,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:57:33,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:57:33,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:57:33,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:57:33,310 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:57:33,311 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:57:33,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:57:33,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:57:33,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:57:33,559 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:57:33,561 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:57:33,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_rmo.oepc_bound2.i [2023-08-03 23:57:34,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:57:35,023 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:57:35,024 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_rmo.oepc_bound2.i [2023-08-03 23:57:35,038 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0408594e/6c313ffc61574926bcca2e3ba9a0422a/FLAG66125a56e [2023-08-03 23:57:35,051 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0408594e/6c313ffc61574926bcca2e3ba9a0422a [2023-08-03 23:57:35,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:57:35,055 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:57:35,056 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:57:35,056 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:57:35,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:57:35,059 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,060 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b8ce43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35, skipping insertion in model container [2023-08-03 23:57:35,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,121 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:57:35,297 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_rmo.oepc_bound2.i[992,1005] [2023-08-03 23:57:35,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:57:35,538 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:57:35,549 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_rmo.oepc_bound2.i[992,1005] [2023-08-03 23:57:35,570 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 23:57:35,572 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 23:57:35,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:57:35,629 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:57:35,629 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:57:35,634 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:57:35,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35 WrapperNode [2023-08-03 23:57:35,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:57:35,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:57:35,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:57:35,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:57:35,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,672 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,709 INFO L138 Inliner]: procedures = 176, calls = 73, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 162 [2023-08-03 23:57:35,710 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:57:35,710 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:57:35,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:57:35,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:57:35,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,734 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,747 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:57:35,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:57:35,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:57:35,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:57:35,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (1/1) ... [2023-08-03 23:57:35,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:57:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:35,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:57:35,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:57:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 23:57:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:57:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:57:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:57:35,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:57:35,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:57:35,840 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:57:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:57:35,841 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:57:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:57:35,841 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:57:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:57:35,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:57:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:57:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:57:35,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:57:35,843 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:57:35,992 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:57:35,994 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:57:36,382 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:57:36,596 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:57:36,596 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:57:36,599 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:57:36 BoogieIcfgContainer [2023-08-03 23:57:36,599 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:57:36,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:57:36,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:57:36,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:57:36,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:57:35" (1/3) ... [2023-08-03 23:57:36,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec396d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:57:36, skipping insertion in model container [2023-08-03 23:57:36,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:57:35" (2/3) ... [2023-08-03 23:57:36,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec396d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:57:36, skipping insertion in model container [2023-08-03 23:57:36,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:57:36" (3/3) ... [2023-08-03 23:57:36,609 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_rfi009_rmo.oepc_bound2.i [2023-08-03 23:57:36,617 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:57:36,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:57:36,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 23:57:36,626 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:57:36,694 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:57:36,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 23:57:36,894 INFO L124 PetriNetUnfolderBase]: 30/462 cut-off events. [2023-08-03 23:57:36,894 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:57:36,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 462 events. 30/462 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1906 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2023-08-03 23:57:36,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 23:57:36,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:36,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:57:36,921 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:36,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:36,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-03 23:57:36,962 INFO L124 PetriNetUnfolderBase]: 6/230 cut-off events. [2023-08-03 23:57:36,963 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:57:36,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 230 events. 6/230 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 590 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-03 23:57:36,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 1190 [2023-08-03 23:57:41,712 INFO L134 LiptonReduction]: Checked pairs total: 2662 [2023-08-03 23:57:41,713 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-03 23:57:41,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:57:41,729 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@500600e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:57:41,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:57:41,733 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:57:41,733 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-03 23:57:41,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:57:41,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:41,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:57:41,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:41,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash 916846097, now seen corresponding path program 1 times [2023-08-03 23:57:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:41,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17070881] [2023-08-03 23:57:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:41,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:57:41,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:57:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:57:41,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:57:41,913 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:57:41,914 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:57:41,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:57:41,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:57:41,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:57:41,917 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:57:41,922 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:57:41,923 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:57:41,923 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:57:41,969 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:57:41,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:57:42,205 INFO L124 PetriNetUnfolderBase]: 93/1375 cut-off events. [2023-08-03 23:57:42,206 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:57:42,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 1375 events. 93/1375 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9121 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1007. Up to 54 conditions per place. [2023-08-03 23:57:42,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:57:42,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:42,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:57:42,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:42,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:42,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 139 transitions, 314 flow [2023-08-03 23:57:42,281 INFO L124 PetriNetUnfolderBase]: 12/592 cut-off events. [2023-08-03 23:57:42,281 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:57:42,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 592 events. 12/592 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2811 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 485. Up to 27 conditions per place. [2023-08-03 23:57:42,292 INFO L119 LiptonReduction]: Number of co-enabled transitions 3216 [2023-08-03 23:57:47,329 INFO L134 LiptonReduction]: Checked pairs total: 9848 [2023-08-03 23:57:47,329 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-03 23:57:47,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:57:47,334 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@500600e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:57:47,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:57:47,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:57:47,340 INFO L124 PetriNetUnfolderBase]: 0/56 cut-off events. [2023-08-03 23:57:47,341 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:57:47,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:47,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:47,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:47,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1243043645, now seen corresponding path program 1 times [2023-08-03 23:57:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:47,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995666900] [2023-08-03 23:57:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:57:47,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:47,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995666900] [2023-08-03 23:57:47,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995666900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:47,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:57:47,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:57:47,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546065264] [2023-08-03 23:57:47,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:47,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:57:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:57:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:57:47,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 272 [2023-08-03 23:57:47,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:47,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:47,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 272 [2023-08-03 23:57:47,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:54,378 INFO L124 PetriNetUnfolderBase]: 36860/50640 cut-off events. [2023-08-03 23:57:54,378 INFO L125 PetriNetUnfolderBase]: For 3606/3606 co-relation queries the response was YES. [2023-08-03 23:57:54,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103079 conditions, 50640 events. 36860/50640 cut-off events. For 3606/3606 co-relation queries the response was YES. Maximal size of possible extension queue 1676. Compared 322340 event pairs, 29454 based on Foata normal form. 0/49902 useless extension candidates. Maximal degree in co-relation 29416. Up to 47970 conditions per place. [2023-08-03 23:57:54,722 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 32 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-03 23:57:54,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 192 flow [2023-08-03 23:57:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:57:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:57:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-03 23:57:54,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723039215686274 [2023-08-03 23:57:54,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-03 23:57:54,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-03 23:57:54,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:54,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-03 23:57:54,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:54,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:54,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:54,767 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 116 flow. Second operand 3 states and 467 transitions. [2023-08-03 23:57:54,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 192 flow [2023-08-03 23:57:54,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 44 transitions, 186 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:57:54,780 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 122 flow [2023-08-03 23:57:54,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-03 23:57:54,786 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-03 23:57:54,788 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 122 flow [2023-08-03 23:57:54,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:54,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:54,794 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:57:54,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:57:54,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:54,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:54,799 INFO L85 PathProgramCache]: Analyzing trace with hash 691821100, now seen corresponding path program 1 times [2023-08-03 23:57:54,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:54,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224966332] [2023-08-03 23:57:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:54,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:57:54,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:54,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224966332] [2023-08-03 23:57:54,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224966332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:54,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:57:54,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:57:54,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022574263] [2023-08-03 23:57:54,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:54,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:54,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:54,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:54,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:57:54,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:54,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:54,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:57:54,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:00,454 INFO L124 PetriNetUnfolderBase]: 36848/50601 cut-off events. [2023-08-03 23:58:00,454 INFO L125 PetriNetUnfolderBase]: For 3231/3231 co-relation queries the response was YES. [2023-08-03 23:58:00,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102671 conditions, 50601 events. 36848/50601 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 324063 event pairs, 23904 based on Foata normal form. 9/49890 useless extension candidates. Maximal degree in co-relation 36679. Up to 47923 conditions per place. [2023-08-03 23:58:00,790 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 35 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-03 23:58:00,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 214 flow [2023-08-03 23:58:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:58:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:58:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-08-03 23:58:00,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551470588235294 [2023-08-03 23:58:00,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-08-03 23:58:00,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-08-03 23:58:00,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:00,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-08-03 23:58:00,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:00,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:00,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:00,799 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 122 flow. Second operand 5 states and 755 transitions. [2023-08-03 23:58:00,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 214 flow [2023-08-03 23:58:00,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 211 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:58:00,801 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 136 flow [2023-08-03 23:58:00,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-03 23:58:00,802 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-03 23:58:00,802 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 136 flow [2023-08-03 23:58:00,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:00,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:00,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:58:00,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:58:00,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1049291102, now seen corresponding path program 1 times [2023-08-03 23:58:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:00,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88622782] [2023-08-03 23:58:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:58:00,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:00,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88622782] [2023-08-03 23:58:00,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88622782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:00,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544059755] [2023-08-03 23:58:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:00,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:00,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:00,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:58:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:01,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:58:01,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:58:01,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:58:01,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544059755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:01,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:58:01,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:58:01,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463475649] [2023-08-03 23:58:01,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:01,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:58:01,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:58:01,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:58:01,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 272 [2023-08-03 23:58:01,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:01,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:01,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 272 [2023-08-03 23:58:01,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:06,666 INFO L124 PetriNetUnfolderBase]: 35806/48568 cut-off events. [2023-08-03 23:58:06,666 INFO L125 PetriNetUnfolderBase]: For 2986/2986 co-relation queries the response was YES. [2023-08-03 23:58:06,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99419 conditions, 48568 events. 35806/48568 cut-off events. For 2986/2986 co-relation queries the response was YES. Maximal size of possible extension queue 1640. Compared 302141 event pairs, 27838 based on Foata normal form. 0/48136 useless extension candidates. Maximal degree in co-relation 28416. Up to 46264 conditions per place. [2023-08-03 23:58:07,018 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 38 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 23:58:07,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 236 flow [2023-08-03 23:58:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:58:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:58:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-03 23:58:07,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2023-08-03 23:58:07,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-03 23:58:07,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-03 23:58:07,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:07,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-03 23:58:07,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,028 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 136 flow. Second operand 3 states and 472 transitions. [2023-08-03 23:58:07,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 236 flow [2023-08-03 23:58:07,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 229 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:58:07,032 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 144 flow [2023-08-03 23:58:07,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-03 23:58:07,034 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-03 23:58:07,034 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 144 flow [2023-08-03 23:58:07,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:07,035 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:07,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 23:58:07,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:07,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:58:07,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1949726041, now seen corresponding path program 1 times [2023-08-03 23:58:07,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:07,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079481363] [2023-08-03 23:58:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:07,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:58:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:07,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079481363] [2023-08-03 23:58:07,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079481363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:07,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399309230] [2023-08-03 23:58:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:07,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:07,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:07,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:58:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:07,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:58:07,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:58:07,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:58:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:58:07,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399309230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:58:07,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:58:07,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 23:58:07,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935013257] [2023-08-03 23:58:07,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:58:07,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:58:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:58:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:58:07,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:58:07,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:07,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:58:07,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:12,074 INFO L124 PetriNetUnfolderBase]: 28183/37688 cut-off events. [2023-08-03 23:58:12,074 INFO L125 PetriNetUnfolderBase]: For 2628/2628 co-relation queries the response was YES. [2023-08-03 23:58:12,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77562 conditions, 37688 events. 28183/37688 cut-off events. For 2628/2628 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 220004 event pairs, 17577 based on Foata normal form. 3/37502 useless extension candidates. Maximal degree in co-relation 27599. Up to 36121 conditions per place. [2023-08-03 23:58:12,292 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 36 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-03 23:58:12,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 48 transitions, 229 flow [2023-08-03 23:58:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:58:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:58:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-03 23:58:12,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615808823529411 [2023-08-03 23:58:12,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-03 23:58:12,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-03 23:58:12,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:12,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-03 23:58:12,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:12,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:12,299 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:12,299 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 144 flow. Second operand 4 states and 611 transitions. [2023-08-03 23:58:12,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 48 transitions, 229 flow [2023-08-03 23:58:12,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 48 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:58:12,303 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 139 flow [2023-08-03 23:58:12,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-03 23:58:12,305 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-03 23:58:12,305 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 139 flow [2023-08-03 23:58:12,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:12,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:12,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:12,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:58:12,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:12,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:58:12,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1141137691, now seen corresponding path program 1 times [2023-08-03 23:58:12,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:12,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747367558] [2023-08-03 23:58:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:58:12,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747367558] [2023-08-03 23:58:12,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747367558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:12,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933229170] [2023-08-03 23:58:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:12,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:12,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:12,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:12,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:58:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:12,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:58:12,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:58:12,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:58:12,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933229170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:12,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:58:12,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:58:12,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061337207] [2023-08-03 23:58:12,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:12,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:58:12,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:12,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:58:12,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:58:12,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:58:12,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:12,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:12,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:58:12,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:17,009 INFO L124 PetriNetUnfolderBase]: 27775/37321 cut-off events. [2023-08-03 23:58:17,010 INFO L125 PetriNetUnfolderBase]: For 2131/2131 co-relation queries the response was YES. [2023-08-03 23:58:17,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76737 conditions, 37321 events. 27775/37321 cut-off events. For 2131/2131 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 222141 event pairs, 7042 based on Foata normal form. 144/37276 useless extension candidates. Maximal degree in co-relation 27290. Up to 34755 conditions per place. [2023-08-03 23:58:17,241 INFO L140 encePairwiseOnDemand]: 268/272 looper letters, 51 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-08-03 23:58:17,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 293 flow [2023-08-03 23:58:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:58:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:58:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 770 transitions. [2023-08-03 23:58:17,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661764705882353 [2023-08-03 23:58:17,246 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 770 transitions. [2023-08-03 23:58:17,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 770 transitions. [2023-08-03 23:58:17,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:17,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 770 transitions. [2023-08-03 23:58:17,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:17,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:17,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:17,252 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 139 flow. Second operand 5 states and 770 transitions. [2023-08-03 23:58:17,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 293 flow [2023-08-03 23:58:17,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 286 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:58:17,254 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 149 flow [2023-08-03 23:58:17,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2023-08-03 23:58:17,255 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-03 23:58:17,255 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 149 flow [2023-08-03 23:58:17,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:17,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:17,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:17,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:58:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:17,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:58:17,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash 425132774, now seen corresponding path program 1 times [2023-08-03 23:58:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020228808] [2023-08-03 23:58:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:17,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:58:17,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020228808] [2023-08-03 23:58:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020228808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:17,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388340855] [2023-08-03 23:58:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:17,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:17,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:17,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:58:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:17,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:58:17,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:58:17,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:58:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:58:17,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388340855] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:58:17,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:58:17,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:58:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783243574] [2023-08-03 23:58:17,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:58:17,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:58:17,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:58:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:58:17,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 272 [2023-08-03 23:58:17,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:17,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:17,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 272 [2023-08-03 23:58:17,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:21,419 INFO L124 PetriNetUnfolderBase]: 23296/31042 cut-off events. [2023-08-03 23:58:21,419 INFO L125 PetriNetUnfolderBase]: For 2629/2629 co-relation queries the response was YES. [2023-08-03 23:58:21,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64329 conditions, 31042 events. 23296/31042 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 177614 event pairs, 13702 based on Foata normal form. 36/30925 useless extension candidates. Maximal degree in co-relation 22827. Up to 28852 conditions per place. [2023-08-03 23:58:21,573 INFO L140 encePairwiseOnDemand]: 269/272 looper letters, 47 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-03 23:58:21,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 279 flow [2023-08-03 23:58:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:58:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:58:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-08-03 23:58:21,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5716911764705882 [2023-08-03 23:58:21,576 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-08-03 23:58:21,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-08-03 23:58:21,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:21,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-08-03 23:58:21,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:21,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:21,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:21,580 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 149 flow. Second operand 4 states and 622 transitions. [2023-08-03 23:58:21,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 279 flow [2023-08-03 23:58:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 274 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:58:21,582 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 142 flow [2023-08-03 23:58:21,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2023-08-03 23:58:21,583 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-08-03 23:58:21,583 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 142 flow [2023-08-03 23:58:21,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:21,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:21,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:21,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:58:21,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:21,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:58:21,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1124590381, now seen corresponding path program 1 times [2023-08-03 23:58:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:21,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270208302] [2023-08-03 23:58:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:21,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:58:21,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:21,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270208302] [2023-08-03 23:58:21,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270208302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:21,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:58:21,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:58:21,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686041899] [2023-08-03 23:58:21,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:58:21,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:21,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:58:21,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:58:21,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 272 [2023-08-03 23:58:21,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:21,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:21,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 272 [2023-08-03 23:58:21,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:23,952 INFO L124 PetriNetUnfolderBase]: 13312/18223 cut-off events. [2023-08-03 23:58:23,953 INFO L125 PetriNetUnfolderBase]: For 2170/2170 co-relation queries the response was YES. [2023-08-03 23:58:23,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38682 conditions, 18223 events. 13312/18223 cut-off events. For 2170/2170 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 100838 event pairs, 952 based on Foata normal form. 2304/20374 useless extension candidates. Maximal degree in co-relation 15245. Up to 13200 conditions per place. [2023-08-03 23:58:23,987 INFO L140 encePairwiseOnDemand]: 270/272 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2023-08-03 23:58:23,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 294 flow [2023-08-03 23:58:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:58:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:58:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-03 23:58:23,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790441176470589 [2023-08-03 23:58:23,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-03 23:58:23,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-03 23:58:23,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:23,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-03 23:58:23,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:23,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:23,992 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:23,992 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 142 flow. Second operand 4 states and 630 transitions. [2023-08-03 23:58:23,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 294 flow [2023-08-03 23:58:24,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:58:24,091 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-03 23:58:24,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-03 23:58:24,091 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-03 23:58:24,091 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-03 23:58:24,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:24,092 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:58:24,092 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:58:24,092 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:58:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 23:58:24,093 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:24,093 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:58:24,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:58:24,214 INFO L124 PetriNetUnfolderBase]: 93/1375 cut-off events. [2023-08-03 23:58:24,214 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:58:24,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 1375 events. 93/1375 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9121 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1007. Up to 54 conditions per place. [2023-08-03 23:58:24,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-03 23:58:24,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:24,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:58:24,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:24,222 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:24,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-03 23:58:24,307 INFO L124 PetriNetUnfolderBase]: 66/1038 cut-off events. [2023-08-03 23:58:24,307 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-03 23:58:24,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 1038 events. 66/1038 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6229 event pairs, 0 based on Foata normal form. 0/933 useless extension candidates. Maximal degree in co-relation 779. Up to 54 conditions per place. [2023-08-03 23:58:24,325 INFO L119 LiptonReduction]: Number of co-enabled transitions 4356 [2023-08-03 23:58:29,225 INFO L134 LiptonReduction]: Checked pairs total: 12941 [2023-08-03 23:58:29,225 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-03 23:58:29,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:58:29,226 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@500600e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:58:29,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 23:58:29,231 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:58:29,231 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-03 23:58:29,231 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 23:58:29,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:29,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:29,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:58:29,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1948667280, now seen corresponding path program 1 times [2023-08-03 23:58:29,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:29,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877513012] [2023-08-03 23:58:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:29,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877513012] [2023-08-03 23:58:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877513012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:29,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:58:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:58:29,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396327195] [2023-08-03 23:58:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:58:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:58:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:58:29,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-03 23:58:29,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:29,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:29,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-03 23:58:29,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:51,117 INFO L124 PetriNetUnfolderBase]: 155552/201489 cut-off events. [2023-08-03 23:58:51,117 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2023-08-03 23:58:51,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403622 conditions, 201489 events. 155552/201489 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 5384. Compared 1264327 event pairs, 126978 based on Foata normal form. 5292/195621 useless extension candidates. Maximal degree in co-relation 115485. Up to 198414 conditions per place. [2023-08-03 23:58:52,082 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 37 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-03 23:58:52,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 198 flow [2023-08-03 23:58:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:58:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:58:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-03 23:58:52,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543859649122806 [2023-08-03 23:58:52,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-03 23:58:52,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-03 23:58:52,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:52,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-03 23:58:52,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:52,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:52,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:52,087 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 474 transitions. [2023-08-03 23:58:52,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 198 flow [2023-08-03 23:58:52,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:58:52,088 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-03 23:58:52,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-03 23:58:52,089 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-03 23:58:52,089 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-03 23:58:52,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:52,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:52,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:52,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:58:52,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:58:52,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1835376683, now seen corresponding path program 1 times [2023-08-03 23:58:52,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:52,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264384139] [2023-08-03 23:58:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:52,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:52,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264384139] [2023-08-03 23:58:52,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264384139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:52,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077236471] [2023-08-03 23:58:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:52,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:52,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:52,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:58:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:52,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:58:52,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:58:52,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:58:52,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077236471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:52,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:58:52,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:58:52,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621263282] [2023-08-03 23:58:52,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:52,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:58:52,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:58:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:58:52,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-03 23:58:52,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:52,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:52,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-03 23:58:52,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:10,604 INFO L124 PetriNetUnfolderBase]: 131638/169000 cut-off events. [2023-08-03 23:59:10,604 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-03 23:59:11,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340037 conditions, 169000 events. 131638/169000 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 4567. Compared 1028412 event pairs, 104770 based on Foata normal form. 0/163432 useless extension candidates. Maximal degree in co-relation 340000. Up to 167305 conditions per place. [2023-08-03 23:59:11,519 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 43 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 23:59:11,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 228 flow [2023-08-03 23:59:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-03 23:59:11,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578947368421052 [2023-08-03 23:59:11,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-03 23:59:11,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-03 23:59:11,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:11,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-03 23:59:11,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:11,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:11,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:11,525 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 120 flow. Second operand 3 states and 477 transitions. [2023-08-03 23:59:11,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 228 flow [2023-08-03 23:59:11,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:11,527 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 130 flow [2023-08-03 23:59:11,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-03 23:59:11,528 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-03 23:59:11,528 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 130 flow [2023-08-03 23:59:11,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:11,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:11,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:11,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:11,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 23:59:11,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:11,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:11,737 INFO L85 PathProgramCache]: Analyzing trace with hash 105740719, now seen corresponding path program 1 times [2023-08-03 23:59:11,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:11,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589685405] [2023-08-03 23:59:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:59:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589685405] [2023-08-03 23:59:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589685405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791567083] [2023-08-03 23:59:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:11,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:11,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:11,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:59:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:11,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:59:11,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:11,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:59:11,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791567083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:11,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:59:11,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:59:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438943125] [2023-08-03 23:59:11,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:11,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:11,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:11,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-03 23:59:11,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:11,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:11,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-03 23:59:11,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:29,645 INFO L124 PetriNetUnfolderBase]: 129222/165726 cut-off events. [2023-08-03 23:59:29,646 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-03 23:59:30,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333925 conditions, 165726 events. 129222/165726 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 4602. Compared 988619 event pairs, 101118 based on Foata normal form. 0/160671 useless extension candidates. Maximal degree in co-relation 95808. Up to 159021 conditions per place. [2023-08-03 23:59:30,594 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 50 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 23:59:30,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 264 flow [2023-08-03 23:59:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:59:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:59:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-03 23:59:30,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5649122807017544 [2023-08-03 23:59:30,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-03 23:59:30,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-03 23:59:30,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:30,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-03 23:59:30,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:30,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:30,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:30,599 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 130 flow. Second operand 3 states and 483 transitions. [2023-08-03 23:59:30,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 264 flow [2023-08-03 23:59:30,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:30,603 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 140 flow [2023-08-03 23:59:30,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-08-03 23:59:30,603 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-03 23:59:30,603 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 140 flow [2023-08-03 23:59:30,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:30,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:30,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:30,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:30,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:30,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:30,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:30,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1068830084, now seen corresponding path program 1 times [2023-08-03 23:59:30,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:30,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327092762] [2023-08-03 23:59:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:30,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327092762] [2023-08-03 23:59:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327092762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:30,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072102521] [2023-08-03 23:59:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:30,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:30,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:30,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 23:59:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:31,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:31,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:31,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:59:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072102521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:31,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:59:31,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123339459] [2023-08-03 23:59:31,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:31,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:31,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 23:59:31,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:31,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:31,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 23:59:31,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:45,427 INFO L124 PetriNetUnfolderBase]: 101278/128552 cut-off events. [2023-08-03 23:59:45,428 INFO L125 PetriNetUnfolderBase]: For 9501/9501 co-relation queries the response was YES. [2023-08-03 23:59:45,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267146 conditions, 128552 events. 101278/128552 cut-off events. For 9501/9501 co-relation queries the response was YES. Maximal size of possible extension queue 3717. Compared 730579 event pairs, 66426 based on Foata normal form. 3/128366 useless extension candidates. Maximal degree in co-relation 94838. Up to 127384 conditions per place. [2023-08-03 23:59:46,180 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 42 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-03 23:59:46,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 248 flow [2023-08-03 23:59:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-03 23:59:46,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412280701754386 [2023-08-03 23:59:46,182 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-03 23:59:46,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-03 23:59:46,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:46,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-03 23:59:46,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,185 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 140 flow. Second operand 4 states and 617 transitions. [2023-08-03 23:59:46,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 248 flow [2023-08-03 23:59:46,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:46,197 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 152 flow [2023-08-03 23:59:46,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-03 23:59:46,198 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-03 23:59:46,198 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 152 flow [2023-08-03 23:59:46,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:46,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:46,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:46,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:46,403 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:46,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash 546881098, now seen corresponding path program 1 times [2023-08-03 23:59:46,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:46,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338766920] [2023-08-03 23:59:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:46,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:46,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:46,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338766920] [2023-08-03 23:59:46,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338766920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:46,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115985341] [2023-08-03 23:59:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:46,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:46,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:46,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:46,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 23:59:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:46,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:46,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:46,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 23:59:46,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115985341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:46,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:59:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157721084] [2023-08-03 23:59:46,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:46,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:46,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 23:59:46,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:46,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:46,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 23:59:46,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:58,797 INFO L124 PetriNetUnfolderBase]: 84352/106246 cut-off events. [2023-08-03 23:59:58,797 INFO L125 PetriNetUnfolderBase]: For 6813/6813 co-relation queries the response was YES. [2023-08-03 23:59:59,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220094 conditions, 106246 events. 84352/106246 cut-off events. For 6813/6813 co-relation queries the response was YES. Maximal size of possible extension queue 3428. Compared 591916 event pairs, 52642 based on Foata normal form. 36/106129 useless extension candidates. Maximal degree in co-relation 78012. Up to 104044 conditions per place. [2023-08-03 23:59:59,421 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 53 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-08-03 23:59:59,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 304 flow [2023-08-03 23:59:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 628 transitions. [2023-08-03 23:59:59,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508771929824562 [2023-08-03 23:59:59,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 628 transitions. [2023-08-03 23:59:59,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 628 transitions. [2023-08-03 23:59:59,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:59,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 628 transitions. [2023-08-03 23:59:59,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:59,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:59,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:59,426 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 152 flow. Second operand 4 states and 628 transitions. [2023-08-03 23:59:59,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 304 flow [2023-08-03 23:59:59,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 297 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 23:59:59,434 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 159 flow [2023-08-03 23:59:59,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-03 23:59:59,435 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-03 23:59:59,435 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 159 flow [2023-08-03 23:59:59,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:59,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:59,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:59,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:59,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 23:59:59,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 23:59:59,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1146539901, now seen corresponding path program 1 times [2023-08-03 23:59:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:59,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067432964] [2023-08-03 23:59:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:59,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:59,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067432964] [2023-08-03 23:59:59,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067432964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:59:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389338457] [2023-08-03 23:59:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:59:59,702 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:59:59,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 23:59:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:59,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:59:59,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:59:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:59,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:59:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:59:59,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389338457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:59:59,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:59:59,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:59:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848546138] [2023-08-03 23:59:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:59:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:59:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:59:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:59,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-03 23:59:59,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:59:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:59,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-03 23:59:59,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:11,537 INFO L124 PetriNetUnfolderBase]: 75688/95143 cut-off events. [2023-08-04 00:00:11,538 INFO L125 PetriNetUnfolderBase]: For 6040/6040 co-relation queries the response was YES. [2023-08-04 00:00:11,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197815 conditions, 95143 events. 75688/95143 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 3191. Compared 509965 event pairs, 35320 based on Foata normal form. 576/95566 useless extension candidates. Maximal degree in co-relation 70042. Up to 62836 conditions per place. [2023-08-04 00:00:12,158 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 65 selfloop transitions, 3 changer transitions 1/76 dead transitions. [2023-08-04 00:00:12,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 359 flow [2023-08-04 00:00:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:00:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:00:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-04 00:00:12,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-08-04 00:00:12,160 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-04 00:00:12,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-04 00:00:12,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:12,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-04 00:00:12,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:12,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:12,163 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:12,163 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 159 flow. Second operand 4 states and 640 transitions. [2023-08-04 00:00:12,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 359 flow [2023-08-04 00:00:12,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 352 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:00:12,168 INFO L231 Difference]: Finished difference. Result has 70 places, 45 transitions, 166 flow [2023-08-04 00:00:12,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2023-08-04 00:00:12,169 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 00:00:12,169 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 166 flow [2023-08-04 00:00:12,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:12,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:12,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:12,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:00:12,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:00:12,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:12,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash 349664665, now seen corresponding path program 1 times [2023-08-04 00:00:12,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:12,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337194225] [2023-08-04 00:00:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:12,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:00:12,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:12,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337194225] [2023-08-04 00:00:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337194225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:12,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:00:12,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:00:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060945892] [2023-08-04 00:00:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:12,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:00:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:00:12,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:00:12,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-04 00:00:12,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:12,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:12,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-04 00:00:12,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:28,745 INFO L124 PetriNetUnfolderBase]: 112456/140506 cut-off events. [2023-08-04 00:00:28,746 INFO L125 PetriNetUnfolderBase]: For 44323/44323 co-relation queries the response was YES. [2023-08-04 00:00:29,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306595 conditions, 140506 events. 112456/140506 cut-off events. For 44323/44323 co-relation queries the response was YES. Maximal size of possible extension queue 4224. Compared 786282 event pairs, 21886 based on Foata normal form. 3600/144016 useless extension candidates. Maximal degree in co-relation 108356. Up to 110692 conditions per place. [2023-08-04 00:00:29,834 INFO L140 encePairwiseOnDemand]: 280/285 looper letters, 63 selfloop transitions, 3 changer transitions 33/104 dead transitions. [2023-08-04 00:00:29,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 529 flow [2023-08-04 00:00:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:00:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:00:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 816 transitions. [2023-08-04 00:00:29,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726315789473684 [2023-08-04 00:00:29,836 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 816 transitions. [2023-08-04 00:00:29,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 816 transitions. [2023-08-04 00:00:29,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:29,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 816 transitions. [2023-08-04 00:00:29,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.2) internal successors, (816), 5 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:29,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:29,840 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:29,840 INFO L175 Difference]: Start difference. First operand has 70 places, 45 transitions, 166 flow. Second operand 5 states and 816 transitions. [2023-08-04 00:00:29,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 529 flow [2023-08-04 00:00:29,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 515 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:00:29,877 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 186 flow [2023-08-04 00:00:29,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2023-08-04 00:00:29,878 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-04 00:00:29,878 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 186 flow [2023-08-04 00:00:29,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:29,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:29,879 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:29,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 00:00:29,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:29,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1709921364, now seen corresponding path program 1 times [2023-08-04 00:00:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:29,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84440407] [2023-08-04 00:00:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:00:30,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:30,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84440407] [2023-08-04 00:00:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84440407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:30,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:00:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:00:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123907899] [2023-08-04 00:00:30,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:30,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:00:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:00:30,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:00:30,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 285 [2023-08-04 00:00:30,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:30,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:30,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 285 [2023-08-04 00:00:30,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:42,895 INFO L124 PetriNetUnfolderBase]: 80956/104119 cut-off events. [2023-08-04 00:00:42,899 INFO L125 PetriNetUnfolderBase]: For 33132/33132 co-relation queries the response was YES. [2023-08-04 00:00:43,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229553 conditions, 104119 events. 80956/104119 cut-off events. For 33132/33132 co-relation queries the response was YES. Maximal size of possible extension queue 3502. Compared 603553 event pairs, 58388 based on Foata normal form. 2640/105440 useless extension candidates. Maximal degree in co-relation 229474. Up to 84165 conditions per place. [2023-08-04 00:00:43,788 INFO L140 encePairwiseOnDemand]: 280/285 looper letters, 67 selfloop transitions, 3 changer transitions 31/110 dead transitions. [2023-08-04 00:00:43,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 579 flow [2023-08-04 00:00:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:00:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:00:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 832 transitions. [2023-08-04 00:00:43,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.583859649122807 [2023-08-04 00:00:43,790 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 832 transitions. [2023-08-04 00:00:43,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 832 transitions. [2023-08-04 00:00:43,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:43,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 832 transitions. [2023-08-04 00:00:43,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.4) internal successors, (832), 5 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:43,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:43,793 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:43,793 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 186 flow. Second operand 5 states and 832 transitions. [2023-08-04 00:00:43,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 579 flow [2023-08-04 00:00:44,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 574 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:00:44,672 INFO L231 Difference]: Finished difference. Result has 77 places, 49 transitions, 208 flow [2023-08-04 00:00:44,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=77, PETRI_TRANSITIONS=49} [2023-08-04 00:00:44,672 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2023-08-04 00:00:44,673 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 49 transitions, 208 flow [2023-08-04 00:00:44,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:44,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:44,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:44,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:00:44,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:44,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1323379621, now seen corresponding path program 1 times [2023-08-04 00:00:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491268727] [2023-08-04 00:00:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:44,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:00:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491268727] [2023-08-04 00:00:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491268727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:00:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248051304] [2023-08-04 00:00:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:46,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:00:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:00:46,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:00:46,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:00:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:46,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-04 00:00:46,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:00:47,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-04 00:00:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:00:47,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:00:47,462 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 00:00:47,463 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 126 [2023-08-04 00:00:47,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 97 [2023-08-04 00:00:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:00:48,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248051304] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:00:48,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:00:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 5] total 15 [2023-08-04 00:00:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771336046] [2023-08-04 00:00:48,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:00:48,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 00:00:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 00:00:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-04 00:00:48,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 285 [2023-08-04 00:00:48,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 49 transitions, 208 flow. Second operand has 16 states, 16 states have (on average 122.375) internal successors, (1958), 16 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:48,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:48,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 285 [2023-08-04 00:00:48,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:58,869 INFO L124 PetriNetUnfolderBase]: 54350/70975 cut-off events. [2023-08-04 00:00:58,869 INFO L125 PetriNetUnfolderBase]: For 54253/54253 co-relation queries the response was YES. [2023-08-04 00:00:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180420 conditions, 70975 events. 54350/70975 cut-off events. For 54253/54253 co-relation queries the response was YES. Maximal size of possible extension queue 1864. Compared 406390 event pairs, 7906 based on Foata normal form. 2184/72339 useless extension candidates. Maximal degree in co-relation 180332. Up to 44293 conditions per place. [2023-08-04 00:00:59,494 INFO L140 encePairwiseOnDemand]: 266/285 looper letters, 187 selfloop transitions, 80 changer transitions 29/305 dead transitions. [2023-08-04 00:00:59,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 305 transitions, 1749 flow [2023-08-04 00:00:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-04 00:00:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-04 00:00:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2642 transitions. [2023-08-04 00:00:59,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46350877192982454 [2023-08-04 00:00:59,499 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2642 transitions. [2023-08-04 00:00:59,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2642 transitions. [2023-08-04 00:00:59,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:59,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2642 transitions. [2023-08-04 00:00:59,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.1) internal successors, (2642), 20 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:59,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 285.0) internal successors, (5985), 21 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:59,525 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 285.0) internal successors, (5985), 21 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:59,526 INFO L175 Difference]: Start difference. First operand has 77 places, 49 transitions, 208 flow. Second operand 20 states and 2642 transitions. [2023-08-04 00:00:59,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 305 transitions, 1749 flow [2023-08-04 00:00:59,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 305 transitions, 1732 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:00:59,584 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 855 flow [2023-08-04 00:00:59,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=855, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2023-08-04 00:00:59,585 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2023-08-04 00:00:59,585 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 855 flow [2023-08-04 00:00:59,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 122.375) internal successors, (1958), 16 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:59,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:59,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:59,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:00:59,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 00:00:59,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:00:59,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash 62707715, now seen corresponding path program 1 times [2023-08-04 00:00:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:59,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746986656] [2023-08-04 00:00:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:59,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:01:01,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:01,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746986656] [2023-08-04 00:01:01,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746986656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:01:01,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874359794] [2023-08-04 00:01:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:01,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:01:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:01:01,942 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:01:01,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:01:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:02,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-04 00:01:02,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:01:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:01:02,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:01:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:01:02,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874359794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:01:02,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:01:02,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 5] total 13 [2023-08-04 00:01:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611799029] [2023-08-04 00:01:02,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:01:02,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 00:01:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:01:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 00:01:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-04 00:01:02,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 285 [2023-08-04 00:01:02,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 855 flow. Second operand has 14 states, 14 states have (on average 126.92857142857143) internal successors, (1777), 14 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:02,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:01:02,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 285 [2023-08-04 00:01:02,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:22,454 INFO L124 PetriNetUnfolderBase]: 96465/127305 cut-off events. [2023-08-04 00:01:22,455 INFO L125 PetriNetUnfolderBase]: For 556212/556399 co-relation queries the response was YES. [2023-08-04 00:01:23,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523114 conditions, 127305 events. 96465/127305 cut-off events. For 556212/556399 co-relation queries the response was YES. Maximal size of possible extension queue 4134. Compared 806734 event pairs, 9152 based on Foata normal form. 3013/129189 useless extension candidates. Maximal degree in co-relation 523010. Up to 34041 conditions per place. [2023-08-04 00:01:24,026 INFO L140 encePairwiseOnDemand]: 264/285 looper letters, 382 selfloop transitions, 265 changer transitions 18/674 dead transitions. [2023-08-04 00:01:24,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 674 transitions, 5574 flow [2023-08-04 00:01:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-04 00:01:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-04 00:01:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3127 transitions. [2023-08-04 00:01:24,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49872408293460924 [2023-08-04 00:01:24,031 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3127 transitions. [2023-08-04 00:01:24,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3127 transitions. [2023-08-04 00:01:24,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:01:24,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3127 transitions. [2023-08-04 00:01:24,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 142.13636363636363) internal successors, (3127), 22 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:24,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 285.0) internal successors, (6555), 23 states have internal predecessors, (6555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:24,041 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 285.0) internal successors, (6555), 23 states have internal predecessors, (6555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:24,041 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 855 flow. Second operand 22 states and 3127 transitions. [2023-08-04 00:01:24,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 674 transitions, 5574 flow [2023-08-04 00:01:27,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 674 transitions, 5570 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 00:01:27,619 INFO L231 Difference]: Finished difference. Result has 139 places, 378 transitions, 3555 flow [2023-08-04 00:01:27,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3555, PETRI_PLACES=139, PETRI_TRANSITIONS=378} [2023-08-04 00:01:27,620 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2023-08-04 00:01:27,621 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 378 transitions, 3555 flow [2023-08-04 00:01:27,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.92857142857143) internal successors, (1777), 14 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:27,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:27,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:01:27,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 00:01:27,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 00:01:27,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:01:27,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:27,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1292691873, now seen corresponding path program 1 times [2023-08-04 00:01:27,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:27,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864465120] [2023-08-04 00:01:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:27,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:01:31,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:31,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864465120] [2023-08-04 00:01:31,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864465120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:01:31,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584102126] [2023-08-04 00:01:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:31,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:01:31,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:01:31,189 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:01:31,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 00:01:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:31,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 85 conjunts are in the unsatisfiable core [2023-08-04 00:01:31,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:01:31,444 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:01:31,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:01:31,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2023-08-04 00:01:32,059 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:01:32,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:01:32,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 00:01:32,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 00:01:32,434 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 00:01:32,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 00:01:32,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 00:01:32,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2023-08-04 00:01:32,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 00:01:32,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-08-04 00:01:32,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2023-08-04 00:01:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:01:33,035 INFO L327 TraceCheckSpWp]: Computing backward predicates...